Statistical monitoring method of citric acid fermentation liquefaction clear liquid based on near infrared spectroscopy

A technology of near-infrared spectroscopy and liquefied clear liquid, which is applied in the field of statistical monitoring of citric acid fermentation liquefied clear liquid, can solve the problems of waste, loss, and long off-line sampling period of total sugar and total nitrogen, etc.

Inactive Publication Date: 2020-08-07
JIANGNAN UNIV +1
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Problems solved by technology

However, when establishing a calibration model for near-infrared spectroscopy, it is usually necessary to have the same sampling rate for process variables and quality variables, and in the process of citric acid liquefaction supernatant, near-infrared spectroscopy analysis is fast, and the off-line sampling period of total sugar and total nitrogen long
Most of the previous methods used the method of downsampling rate. According to the sampling time of total sugar and total nitrogen, different spectral data were sele

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  • Statistical monitoring method of citric acid fermentation liquefaction clear liquid based on near infrared spectroscopy
  • Statistical monitoring method of citric acid fermentation liquefaction clear liquid based on near infrared spectroscopy
  • Statistical monitoring method of citric acid fermentation liquefaction clear liquid based on near infrared spectroscopy

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[0046] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0047] A semi-supervised PPLS monitoring method for citric acid fermentation liquefaction serum based on near-infrared spectroscopy, which is divided into four parts: input and output data collection and preprocessing, and dividing the data set into two parts: labeled data and unlabeled data. Partly, establish a semi-supervised PPLS model and calculate monitoring indicators. Specific steps are as follows:

[0048] Step 1: Spectral data collection and preprocessing

[0049] 1) Sample collection: Collect samples of different dates and batches of citric acid fermentation liquefaction serum under normal operating process and abnormal conditions, and label the samples to obtain a samp...

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Abstract

The invention relates to a statistical monitoring method for citric acid fermentation liquefaction clear liquid based on near infrared spectroscopy. The method comprises the following steps: acquiringand preprocessing input and output data, dividing a data set into two parts, namely marked data and unmarked data, establishing a semi-supervised PPLS model, and calculating monitoring indexes. The method has the beneficial effects that the values of total sugar and total nitrogen are analyzed by mainly adopting manual sampling in the citric acid liquefaction clear liquid process, then the operation state of the process is judged according to the operation experience, an alarm is given afterwards, the alarm can be given only after the product quality is changed, a large amount of waste is caused, and the subsequent citric acid fermentation production is influenced. According to the method, the near infrared spectrum is introduced to detect the process of liquefying the clear liquid by thecitric acid, so that statistical monitoring is realized.

Description

technical field [0001] The invention relates to the field of citric acid fermentation, in particular to a statistical monitoring method for liquefied clear liquid of citric acid fermentation based on near-infrared spectroscopy. Background technique [0002] The citric acid fermentation liquefaction liquid is the product of corn as raw material: firstly crush the corn to obtain corn flour, then add water to dilute it into corn steep liquor, mix sugar water and process water to obtain feed water, adjust it with NaOH, and mix corn steep liquor and feed water in Mix in the batching tank, add amylase to obtain the feed liquid, enter the primary injector, and then divide the feed liquid into two paths, one into the seed mixing tank, one into the secondary injector, add amylase to the feed liquid to obtain a mixed liquid, and adjust with waste acid pH, used for solid-liquid separation, the mixed liquid is separated through the plate and frame after being cooled by the cooler, and t...

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Application Information

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IPC IPC(8): G01N21/359
CPCG01N21/359
Inventor 赵忠盖郝超苗茂栋金赛孙福新胡志杰
Owner JIANGNAN UNIV
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